US2277034A

US2277034A - Sadiron

Info

Publication number: US2277034A
Application number: US264925A
Authority: US
Inventors: Bisley William Frank
Original assignee: Chicago Flexible Shaft Co
Current assignee: Chicago Flexible Shaft Co
Priority date: 1939-03-30
Filing date: 1939-03-30
Publication date: 1942-03-24
Anticipated expiration: 1959-03-24

Description

March 24, 1942.

w. F. BlsLEY v SADIRON Filed March. 50, 1959' 4 Sheets-sheet 1 March 24:9 1942. w. F. BxsLEY SADIRON 4 Sheets-Shea?l 2 Filed March 50, 1939 March 24, 1942. w. F. BISLEY 2,277,034

SADIRON Filed March 30, 1939 4 Sheets-Sheet 5 March 24, 1942..

W. F. BISLEY SADIRON Filed March 30, 1939 fl, r

4 Sheets-Sheet 4 Patented Mar. 24,1942 K i William Frank Bisley, Chicago, Ill., assignor to Chicago Flexible Shaft Company, Chicago, Ill., a corporation of Illinois Application Maren so, 1,939, serial No. 264,925

(Cl. 21a-25) se claims.

This invention relates to electric sadirons and has for its primary .object the provision of a generally improved iron including a novel organization of sole plate cover and handle,l a handle of improved structure, improvedl means for securing the handle to the body o f the iron, improved means 4for adjusting the thermostat mechanism thereof from koutside the iron, and improved means for preventing the heat from the sole plate being transmitted to the handle, and to provide an iron characterized by the lack of the conventional enclosing cover.

Other objects and advantages will appear `from the following description and the accompanying drawings, in whichiron and a screw 26 toward the center thereof,

Figure l is a top view of an electric sadiron embodying my invention;

Fig. 2 is a section on the line 2-2 of Figure 1 showing the sole plate in elevation;

Fig. 3 is a top view ,of the iron with the handle removed;

Fig. 4 is a vertical section taken longitudinally through a further embodiment of the invention; Fig. 5 is a section on the line 5--6 of Fig. 4; Fig. 6 is a section on the line 6'6 of Fig. 4; Figs. 7 and 8 are top and side views respectively of the embodiment shown in Fig. 4 with the handle removed; A

Fig. 9.is a bottom view of the handle of Fig. 4;

Fig. l0 is a section on theline III-I0 of Fig. 9, and

Figs. 11 and 12 are sections on the lines II-II and I2--I2 respectively of Fig. 4.

Referring iirst to the form shown in Figures 1 to 3, the iron comprises a body portion designa'ted` generally by the numeral I4 and a handle portion I5. The body portion includes a sole plate I6 of substantially the same structure as that shown in copending application of Ivar Jepson, Serial No. 38,533, filed August 30, 1935, entitled Sadiron," and includes a metal plate 'having a top cavity in which an electricheating element (not shown) is secured. A thermostat well I1- is also formed therein in which is seated in close proximity to the ironing surface a bimetal blade I8 or similar thermally responsive element. Positioned on the sole plate are a plu-.- rality of sheet metal heat dissipating plates designated generally by the numerals I9, 20, 2|, 22 and 23 having peripheral shapes, as shown in Figs. 1 and 3, the plates being progressively smaller from bottom to top.

The plates I9 to 22 inclusive are secured to the sole plate in superimposed, spaced relation by means of spaced screws 24 at the rear o! the each of said screws having a squared head 26 and a iiange 21 bearing against the plate 2l, spacers 23 serving to space the plate 2|! from the plate I9 and to secure the plate I3 to the sole plate. The plates 2| and 22- have holes as shown at 29 for the passage of the screws. The

plates

20, 2i and 22 are spaced apart by formed projections as indicated at 3l, 32 and 33, and are spot welded together at these points. The

lplate I9 carries a sleeve'34 projecting upwardly therefrom through openings 36 in the plates 20, 2| and 22 for a purpose which will presently appear. l

Secured against the heads of the screws 24 and 1 25 by means of -

screws

36 and 31 is a thermostat and thermostat control mechanism having a frame member 36 provided with ears 33 for the reception of the screws 31. Conductors 4I and 42 are supported on a rear plate 43 of the frame member and are insulated from the plate and from each other by mica strips 44, the conductors being electrically connected to the wires 4E of the conventional electric cord '46 for supplying electrical energy to the heating element. A clamp 41 having a xed member 46 secured to the handle I5 by means of a screw 46 and having a movable member 3| supported on the stationary member and secured thereto by a screw l2 clamps the cord in position within -a chamber 53 of the handle I5. Connected to the conductor 4I is a bracket 54 and supported on the plate 43 is a second bracket 56 carrying spaced stationary contacts 66 and 61. The bracket 55 is connected to the heating element through a lead 58 and the conductor 42 is connected to the heating element through a conductor 59 attached an ear 6I on the conductor 42.

The frame 38 has upturned side edges which are provided at a point spaced from the ends thereof,

upstanding ears

62 and 63 having openings as shown at 64 for the reception of the trunnions 65 of a thermostat adjusting lever 66, the trunnion supporting thislever for rotation about the trunnions. The lever 66 Ahas spaced side members 61 and 68 between which is supported a contact lever 69 carried on a pin 1I having its ends journaled adjacent the end of the side members 61 and 68. A spring 12 acts between the lever 66 and the contact lever 69 normally urging the outer end of the contact lever in a counterclockwise direction facing.Fig. 2. The outer end of the lever 69 has a U-shaped bracket 13 secured thereto and insulated therefrom,` this bracket carrying a strip of bimetal 14 to which are Awheel to define the operating range thereof.

- iron as best shownin Figure l.

attached spaced contacts 'I5 spaced to engage the

stationary contacts

58 and 51, the bimetal strip 14 having a certain amount of freedom in its support to provide for adjustment of the positions of the contacts during opening and -closing movements. The opposite end of the contact lever 89 has an adjusting screw '18 adapted to be engaged by the end of a pin 1'| carried on a thin strip spring 18 attached to the frame member 38 beneath the contact lever 8S as shown at 19, the lower end of the pin 'liresting in predetermined relationwith the free end of the bimetal blade I8 and extending through the sleeve 34 whereby warpage of the outer end of the blade I8 upward with increasing temperature causes rotation of the contact lever 89 to open the contacts 'I5 and 58, 51 at a temperature dependent upon the rotaf gers |02 engage under the plate 22 as shown in tive positionof the adjusting lever 66 and thereby to control the flow of current through the iron.

The lever 66 extends forwardly and has an opening '19 to facilitate insertion o1' the screw 36.4

l sprocket, the rack being retained by confinement between the wheel, the finger 82, and a shoulder 88'formed on the finger 82, the shoulder extending inwardly and into a slot 89 in the side of the wheel 83 whereby to limit the rotation of the It will be seen that when the wheel 83 is rotated the pinion and rack cause simultaneous rotation of i the lever 66 and thereby adjust the position of the contact lever 69 to predetermine the temperature at which the contacts will open.

The handle l5 is preferably formed of a molded insulation material such as one of the many synthetic resins and capable of withstanding a relatively high temperature, preferably in the neighborhood of 2.75 to 300 F. The handle is provided with a frontsupport 9| and rear support 82 for attaching the handle to the iron and providing the central opening for the handle grip, as indicated at' 93. Eachof these handle supports are cored to provide chambers, that in the rear support being the chamber 53, andthat in the front support being the chamberv94, for the reception of the upstanding fingers 82 and the wheel 83, as will presently more fully appear. The handle also includes a base portion asshown at 85 which extends over a substantial part of the This base is hollowed out as shown at 88, and near its periphery is attached to the plate 23 by means of

screws

81, 88, 88 and |0|. The plate 23 is provided with a pair of ,spaced bayonet fingers |02 adjacent its mid portion receivable in slots |03 ofthe plate 22 for attachment of the handle and the plate 23 to the lower portions of the iron, the plate 23 having a slot |04 for the reception of the thermostatmechanism and of the conductors 4| and 42, as will be apparent from Figs. 2-and 3. Thus, the handle is placed upon the remainder of the iron by seating the same over the plate 22 with the fingers 8| and 82 and the hand wheel 83 passing into the chamber 94. 'Ihereupon the handle is moved backward slightlyuntil the bayonet, fin- Fig. 2. Thereupon the

screws

81 and 88 are inserted into the handle through'openings |05 in the plates 20 and 2|. The forward end of the chamber 84 has a slot as shown at |06 through which the forward edge of the wheel83 projects so as to be capable of rotation by means of the thumb of the operator.

A rib |0`| projects upwardlyfrom the plate IB covering the front ends of the plates 20, 2|, 22 and 23 and extending to a point adjacent the lower edge of the wheel 83, thereby closingl the The handle |5 has a rearwardly extending rib,

||2 adapted in combination with balls ||3 and |4 attached to the plate 2|, to serve as a heel rest for the iron. y

The advantages of the invention will in the main be apparent from Fig. 2. It will be seen that the heat required for the ironing operation is generated within the plate i6, and this heat to reach the handle portion of the iron must be transmitted by conduction, radiation or convection. It will be seen that the construction is such that only a minimum conductive path is provided between the sole'plate proper and the handle, and consequently the transmission of heat by conductivity is reduced to a minimum.-

This is further reduced by employing the succession of spaced plates for supporting the handle on the sole plate which functions to reduce the conductive path but also operates to provide possible, reflected downward and away from'the handle. In orde-to further protect the hand of the operator, the handle is formed of insulation material such, for instance, as phenolic resin, and is provided with a wide base as indicated at which serves as a shield for the hand of the operator protecting the hands against heat by conductivity, radiation and convection currents. Itv will be seen that because of the relatively wide plates and the wide base on the haridle, the convection currents are in the main directed outwardly awayfrom the hand of the operator.. Thus, in the iron shown in Figs. 1 to 3, the sole plate 6 is designed to operate at a preferred form of the invention, the numeral I I designates the handle which vis similar in many respects to thevhandle |5 but diners therefrom in material particulars, as will presently be pointed out. The sole plate I8 is substantially identical with that shown in Fig. 2 and includes a metal plate ||6 having a central recess l/||1 within which is positioned the heating element ||8 secured therein by a plate ||9 attached to the upstanding annular walls |2| of the plate, the sole plate being made substantially in accordance with A1eopending application of Ivar Jepson, Serial No.. 38,533, illed August 30, 1935.'I

A shell |4| is seated upon the sole plate |6 enclosing the upper surface thereof and housing the thermostat mechanism, the shell having a portion |42 overhanging the rear of the iron and having a depending edge |43 forming a part of the heel rest for the iron, as will presently more fully appear. The plate |26 has an upstanding flange '|44 closing the rear end of the chamber formed by the shell and having a projection |45 received in an. opening in the shell to locate and support the same. The space between the upstanding flange |44 and the depending edge |43 is spanned bya closure member |46 secured in position by -a screw |41 threaded into a pin |48 depending from the top of the shell, and by pins |50 projecting from the rear side of the flange |44 and received in openings in the'side of the closure member |46, as best shown in Fig. 4. 'Ihe shell is held in position on the sole plate by the projection |45 and by a screw |49 threaded into aspacer nut 15| Aon a screw |52 threaded intoa boss |53 on the sole plate so that when the screw |49 is tightened down, vthe shell is drawn against the upper end of the nut |5|, drawing the shell firmly against the sole plate y atits periphery, the projection |45 preventing Attached to the lateral movement of the shell. inner side of the shell above the contacts |28 is a sheet of mica |54 or other insulation material.

A spacer plate |55 is secured to the top of the shell by means of rivets |56 and |51, the plate being spaced from the top of the shell by down- `Wardly formed ilanges |58 which terminate in a plurality of annularly spaced, fingers |59 which bear against the upper surface of the shell so as Referring now tothe form. of the invention shown in Figs. 4 to 12 inclusive, which is the The thermostat mechanism tacts between the shell and the plate so as to reduce to minimum the heat conductive path between the'two members, and to decrease the area of contact for cooling purposes. `The plate has .an opening |6| for passage of the screw |49 and has an opening |62 registering 'with an opening |68 in the shell forthe passage of electrical conductors |84. which conductors are connected `at one end to supporting members |65, the latter in. turn being connected to the heating element ||8 through the contacts |28 and |29 in substantially thev manner heretofore described in connection with Figs. 1 to 3 for the purpose of supplying current to the heating elements. A sheet of mica or similar insulation material |66 is positioned on the conductors |64 within the shell to provide electrical and heat insulation and to prevent f'ree movement of air through the openings |62 and |63. The plate and the shell also have registering openings |61 for a purpose presently to be described, and have registering openings4 |68 for the .passage of an upstanding thermostat operating yrack |69 pivoted to the lever |24 at |1| for actuation of the lever.

y The side arm 19 also has an inwardly extending to provide a plurality of substantially point conpin |91 receivable inran arcuate slot |98 in the side of the wheel |81, the slot extending only a part of the distance around the wheel and serving as a limit for the rotation of the wheel. As will be seen from Fig. 6, the pin |91 also serves to retain the rack |69 in engagement with the pinion |86, the rack extending upwardly between the pinion and the pin |91. It will be seen that upon rotation of the wheel |81 the pin |84 will be rotated causing the rack |69 to move up or down and thereby adjusting the position of the thermostat lever |24 to predetermine the temperature openings. The wheel |81 is provided .Wlth knurled ribs |99 to facilitate the rotation thereof, and has intermediate spaces 20| upon "which is inscribed lthe names of the materials vto be ironed at the various settings of thewheel. the

' the plate |55 and covers the major portion thereof, the outer contour of the base portion being substantially that of the plate |55. yThe handle is secured to the plate |55 near the forward end A the chamber 238 opening through the front edge thereof by means of a bayonet securing member 208 having a base portion 201 molded into the bottom of the handle, the base portionl having openings 208 through which the material of the handle is molded as shown at 208 to secure the plate in position. The fastening member has depending flanges 2|| and 2|2 each provided with bayonetslots as shown at 2|3 adapted for reception in slots 2|4 in the plate |55 wherebythe flanges may be seated in the slots 2|4 and the handle moved forward so that the metal of the plate |55 at the forward ends ol.' the slots 2|4 is received in the bayonet slots 2|3 to secure the forward end of the handle to' the plate. The lower surface of the base portion 202 is hollowed out to provide a chamber 2|5 in which the sercuring member 205 rests. The bayonet slots 213 are so arranged that when engaged with the plate |55 the forward end of the handle is spaced somewhat from the plate |55 to allow the circulation of air through the chamber. A chamber 245 is provided in the rear support 204 for the reception of the conductors |54, inserts 2|1 being molded into the handle for the purpose of receiving screws 2|8 for attaching the conductors, the inserts 2|'| having externally threaded projecting portions ZIS adapted to receive anut 22| by means of which theleads 222 of a stand.

ard appliance cordV 223 are attached to the inserts. The head of the screws 2|8 serve to draw the ends of the conductors 184 against the outer surface of the nuts 2I9. The shell and the plate |55 have the openings |81 through which a screw driverv is inserted from the bottom of the iron for the purpose of driving the screws -2|8. The

appliance cord 223 is clamped to the handle within the iron by means of a clamp 224 secured around the cord and to the handle by means of a screw 225 engaging an insert 228 in the handle. The rear end of the handle is secured to the plate |55 by means of spaced

screws

221 and 228 threaded into

inserts

229 and 23| molded into the handle, the handle having vertically disposed

ribs

232 and 233 adapted to seat on the upper face of the plate |55 and to carry the inserts 223 permit the circulation of air therebetween.

A further chamber 235 is formed in the front support 203 for the reception of the wheel |81, this chamber having vertically disposed channels 231 and 238 of such width and depth as to re-v ceive the flanges |82 and |83 and thereby, confine the adjusting wheel support |15. It,will be seen A that the support |15 is pivotally carried on the of the handle as best shown in Figs. 4 and 5, the proportions being such that the periphery o f the wheel |81 extends through the slot a short distance sufficient to permit the wheel to be rotatedfrom the exterior of the handle.

Formed n the support 203 ,are a plurality of ribs 24| which extend alongthe sides of the support and around the rear thereof, which ribs serve a number of functions. In the first place they constitute heat dissipating ribs by increasing the surface area of the handle at the base of the support; secondly, they serve as a guard to warn the operator in case the fingers tend to creep down along the support 203 during the ironing operations; thirdly, they serve to partially space the fingers of the operator from the surface of the support 203; in other words, they tend to hold the fingers away from complete surface contact with the support such as might cause burns or discomforture, and fourth, they serve a decorative function, enhancing the appearance of the iron.

Attention is directed to the novel structural features of the invention. that in the form shown ln Fig. fi the presence of the plate |55 and the manner of supporting the handle thereon produces two air spaces disposed above the shell for the purpose of dlssipatlng the heat, this being further facilitated by the presence of the plate |55 which materially increases the heat dissipating area. This is accomplished to such an extent that the resin handle can be caused to overlie a. substantial portion of the iron and be secured thereto by inserts molded into the handle. For example, in irons of this character the sole plate reaches a temperature of 550 F. and frequently somewhat in excess thereof. In our construction 'the shell is reduced to a temperature in the region of 375 to 400 F. Through the present construction the temperature above the platel |55 is reduced to a point such that a resin handle capable of retaining the inserts at a temperature of 275 to 300"v F. may be used without substantial deterioration. Another feature of the invention is the structureby which the handle is secured to the iron including the use of .the bayonet slots 2|3 and associated parts and the provision of the screws and inserts 221 to 23| so arranged that the lscrews are inserted from the bottom of the overhanging portion |42 of the shell whereby the closure member |46 may be secured in place beneath the bottom of the over-hanging portion thereby ,effectively concealing the attaching means. A further advantage of the structure lies in the manner of supporting the thermostat adjusting wheel |81 whereby its support is movable to accommodate itself to the assembling movements of the handle and yet is rigidly se' cured in position as a result of the assembling movements. Another advantage is the facility with which the iron may be disassembled, that is, the handle removed fromthe shell and the shell removed from the sole plate.

A. further advantage lies in th'e form of the' handle whereby a considerable portion of the top It-will be observed of the iron vis Covered by insulation material such that in normal use the hands and fingers of the operator are` protected against accidental con`- tact with portions of the iron so highly heated as to cause injury. It will be seen that the entire base portion 202 of the handle serves this purpose so that should the operatorl occasionally allow the fingers to drop down into contact withl the parts of the iron directly below the fingers, injury to the fingers will not occur. A further feature of the invention isthe novel thermostat adjusting wheel and the novel struc-V ture for supporting the wheel and driving the rack |69.

I claim:l j

1. The combination in a sad-iron of an electrically heated sole plate, a handle member of insulation material for manipulation of the sole to the atmosphere4 substantially throughout the y peripheral edge, and means of relatively small contact area for securing the handle base to the sole plate.

2. The combination in a sad-iron of an electrically heated sole plate, thermostat switch mechanism on the sole plate for controlling the temperature thereof, a shell superimposed on the sole plate and enclosing saidthermostat mechanism, means for locally securing the shell' to the sole plate, a heat dissipating plate spaced above said shell and secured thereto by means of relatively small contact area remote from the first mentioned means, and a handle having a wide base of insulation material spaced above said plate and secured thereto, by means of relatively small contact area said plate providing air spaces between the shell and the handle extending completely across the iron and open to the atmosphere substantially throughout the peripheral edges for the circulation of cooling air therebetween.

3. The combination in a sad-iron of an electrically heated sole plate, spaced heat dissipating members positioned over said sole plate to provide a plurality of air spaces extending completely across the sole plate, a handle secured to Isaid sole plate positioned above said members,

and a body of insulation material disposed between the handle and the outermost of said heat dissipating members to retard the flow of heat to the handle and protect the hand of the operator'.

4. The combination in a sad-iron of an electrically heated sole plate, thermostat switch mechanism on the sole plate for controlling the temperature thereof, a shell superimposed on the sole plate and enclosing said thermostat mechanism, a heat dissipating plate spaced above said shell and secured thereto by means of relatively small contact area, said plate covering a major portion of said shell, and a handle member of insulation material having a wide base portion substantially covering said plate, spaced therefrom and secured thereto, said plate providing a plurality of air spaces between the shell and the base extending completelyacross the iron open to the atmosphere substantially' throughout the peripheral edges for the passage of air therebetween to dissipate the heat at the top of the shell 5. The combination in a sad-iron of an electrically heated sole plate, a handle member of in-` sulation material for manipulation of ythe sole plate, and a plurality of spaced heat dissipating plates disposed between the handle and the sole plate providing a plurality of air spaces extending completely across the sole plate open to the atmosphere substantially throughout the peripheral edges.

6. The combination in a sad-iron of an electrically heated sole plate, having a thermostat mechanism disposed thereon, a handle member for manipulation of the sole plate positioned thereabove and having a bottom chamber, a heat dissipating member disposed between and in spaced relation to the sole plate and the handle providing cooling air spaces between the handle and the sole plate, and a switch mechanism located in said bottom chamber and having motion transmitting means extending through said air spaces and into operative relation with said thermostat mechanism.

7. The combination in a sad-iron of an electrically heated sole plateA having a thermostat p mechanism disposed thereon, a handle member of insulation material for manipulation of the solel plate positioned thereabove comprising a base portion, a handle portion, and front and rear supports for securing the handle portion to the base portion, saidbase and' said supports each having a chamber open at the bottom, a-

heat dissipating member disposed between and in spaced relation to the sole plate and the handle providing cooling air spaces therebetween, switch mechanism located in said base chamber actuated by said` thermostat member, means for adjusting said switch mechanism located in the chamberof said front support, and means within the chamber of the'rear support 'for connecting said switch mechanism to an appliance cord.

8. The combination in a sad-iron of an electrically -heated sole plate, a thermostat switch mechanism on the sole plate for controlling the temperature thereof. a handle member of molded plastic thereabove for manipulation ofthe sole plate, said handle member comprising a handle portion and front and rear supports, each of said supports having a bottom chamber, an appliance cord passing through the side of the rear support and secured within the chamber, means within the chamber of said rear support for connecting the cord to said switch mechanism to supply current thereto, means for controlling said switch mechanism positioned in the chamber of the front support and projecting therefrom for manual manipulation, and means projecting from the bottom of the support for connecting said control means to the switch mechanism;

9.v The combination in a sad-iron of an electrically heated sole plate member, a handle member disposed above the sole plate for manipulation of the same comprising a handle portion arid a support portion having a bottom chamber provided with guide channels, means for securing said handle to said sole plate comprising interengaging portions on said members shaped to be brought into engagement by relative lateral assembling movement of said members, a thermostat switch mechanism positioned on the sole plate, adjusting means in said chamber projecting fromsaid support for manual adjustment 'of said switch mechanism, said adjusting means interiitt'ing in said guide channels to prevent lateral movement of said means, and means for supporting said adjusting means on said sole plate for pivotal movement during said assembling movement of said members.

10. 'I'he combination in a sad-iron of an electrically heated sole plate member, a handle member disposed above the sole plate for manipula.- tion oi' the same, and means for securing said handle to the sole plate comprising a plurality of bayonet fingers secured to one of said members, means on the other of said lmembers for the reception of said fingers to interlock said members upon relative sliding movement, and a screw'.

spaced from said fingers i'or preventing relative return movement of the handle and sole plate.

11. The combination in a sad-iron of an electrically heated sole plate member, thermostaty switch member on the sole plate for controlling the temperature thereof, a handle member disposed above the sole plate for manipulation of the'samecomprisi'ng a handle portion and a Y ing4 relative return movement of said members,

and means for pivotally supporting said switch adjusting means on the sole plate to rotate with said relative movement.

12. The combination in a sad-iron of an elec trically heated sole plate member, a handle member disposed above the sole plate for manipulation of the same. a shell on said sole plate below said handle having a portion overhanging the rear of the sole plate, and means for securing said handle to said sole plate comprising interengaging portions on said handle and said sole plate shaped .to be brought into engagement by relative movement of the handle and sole plate,

and screws -for securingl the members against disengaging movement positioned to be inserted through the bottom of said overhanging portion to conceal the connecting means.

13. The combination in a sed-iron of an electrically heated sole plate, a shell seated on' said sole plate and 'secured thereto in its central area', said shell overhanging the rear of said sole plate to form a heelrest and provide a bottom'chamber, a handle member positioned over, said shell comprising a base portion covering a substantial portion of the central area thereof and extending over said overhanging portion, spaced supporting portions and a handle portion, interiitting means on the bottom of said base portion and on-said shell for securing said handle member and sole plate together, means brought into engagement through said chamber-for securing said members together, and a closure for said chamber to conceal said fastening means..

14. The combination ina sad-iron of a soleplate, means for heating said sole plate to a temperaturein the region of 550 F., a shell cov- -mounted on said temperature reducing 1plate having inserts for attachment thereto, said temperature reducing plate serving to reduce the tem perature4 of said inserts to a point not more than.

pletely across the sole plate. open to the atmosphere' substantially throughout the peripheral edges a` handle secured to said sole plate positioned above said members, and a body of in sulationv material to retard the flow of heat to the handle and protect the hand of the operator. 18. 'Ihe combination in a sad-iron of a sole plate having electrical heating means, thermo-f stat mechanism responsive to temperature ci' the sole plate for` controlling the heating temperature, a shell superimposed on the sole plate and enclosing the thermostat mechanism, means securing theshell to the sole plate, a heat dissipating plate positioned over the shell and spaced therefrom to provide an air space extending completely across the shell and open to the atmosphere substantially throughout the periphery, means of relatively smalllcontact area forl securing the plate to the shell remote from the first. mentioned securing means, a handle of insulation material having integral therewith a wide base substantially covering said plate and spaced therefrom to provide an air space extending completely across the plate and open' to the atmosphere substantially throughout the periphery, and means of relatively small contact area securing the handle to the plate remote from the second mentioned securing means.

17. The combination in a sad-iron of a sole plate structure having electrical heating means, thermostat mechanism responsive to temperature oi' the sole plate for controlling the heating temperature. a. handle of insulation material having integral therewith a front and a rear supporting portion joined by avwide base portion, the handle being positioned on the sole plate structure with the base portion spaced therefrom providing va narrow air space extending completely across the top of the sole plate structure and open to the atmosphere at the-periphery, and means of relatively small contact area securing the handle to the soleplatel structure. y

18. The combination in a sad-iron of an electrically heated sole plate, a heat dissipating plate positioned over the sole plate to provide an air space extending completely across the sole plate and open to the atmosphere at the periphery, a handle of insulation material having integral therewith a wide base portion substantially coveringsaid plate and spaced therefrom toA retard the flow of heat to the handle and to protect thel hand of the operator, and means holding said parts in the relationship defined.

19. v'I'he combination in a sad-iron of an elec- -trically heated sole plate, thermostat lswitch mechanism on the sole plate for controlling the temperature thereof,` a handle .of insulation material having integral therewith a wide base portion arranged to retard the flow -oi' -heat to the handle and protect the hand of the operator, and manually operable control means for the thermostat switch mechanism housed within the insulation Y handle.

20. The combination in a sad-iron of a .sole plate having electrical heating means, thermostat mechanism responsive to temperature of the soie plate for controlling the heating means, a shell structure superimposed onvthe 'sole plate andenclosing the thermostat mechanism, manually operable means for adjusting said thermo;- stat mechanism including a manually operable member located above the shell structure ad- -jacent to the forward end thereof, means for transmitting motion from said member tc the thermostat mechanism, said adjusting means being assembled in operative relation with the sole plateand shell structure, and a handle unit having a .chamber adjacent to its forward end adapted to receive the manually adjustable means and shaped so that when located on the shell structure it will enclose said 'adjusting means except for' the manually adjustable member which is accessible from the exterior for making temperature adjustments.

21. The combination in a sad-iron of an electrically heated sole plate, thermostat switch mechanism on the sole plate for controlling the temperature thereof, a handle of insulation material having integral therewith a hollow front portion and a hollow rear portion joined by a wide base portion, means supporting the handle on the sole plate with the base portion in a position to retard the flow of .heat to the handle and protect the hand vof the operator, manually plate for controllingA the heating meansya shell being assembled in operative relation with the l' cole plate and shell structure so as to constitute on operative unit, a handle unit having a conned chamber adjacent to its forward end adapted to receive the adjusting means, said handle unit` adapted to beshifted relatively to the shell operable means disposed within the front supporting portion of the handle and connected with the thermostat switch mechanism for adjusting the latter, and current supply conductors disposed within the hollow rear portion ofthe handle and connected with the thermostat switch -mechanism for supplying current thereto.

22. The combination in a sad-iron of an electrically heated sole plate structure, a handle of insulation material having' integral therewith a wide base portion substantially covering said structure to retard the flow of heat to the handle and to protect the hand of the operator, and

means operative between the sole plate structure and the base portion of the handle for detachably connecting the handle to the sole plate structure, including a bayonet finger secured to one thereof for interlocking with the other upon relative sliding movement, and means for clamping the handle to the sole plate structure to hold them interlocked.

23. The combination in a sad-iron of a -sole plate having electrical heating means, thermostat mechanism responsive to the temperature of the'sole plate for controlling the heating means,

a shell structure superimposed on the Asole plate and enclosing the thermostat mechanism. manually operable means for adjusting said thermostat mechanism including a manually operable member located above the shell structure, said parts being assembled as an operative unit, and a handle unit having a chamber adjacent to its rear end, an appliance cord passing through the handle unit into said chamber, current `conductors fixed within said chamber and connected to the appliance cord, the rst mentioned unit having current conductors for the electrical heating means projecting therefrom,l the current conductors in the handle unit and on the sole plate unit being arranged so that upon location of the handle unit in working position onthe sole plate unit the conductors of oneunit will be brought into cooperative relation with the conductors of the other unit, and means for holding said units in said operative relation, one with respect to the other.

24. The combination in a sad-iron, a sole plate having electrical heating means, thermostat mechanism responsive to temperature-of the sole thereto, said supporting frame being movable on -thevshell structure to accommodate the shifting movement of the handle unit, inter-engaging means `between the handle and the shell structure adapted to be engaged by said shifting movement of the handle to connect the latter to the shell structure, and means for locking the handle to the shell structure in said position.

25. The combination in a sad-iron of an electrically heated solek plate assembly constituting a completely operative unit having a thermostat switch mechanism for controlling the temperature, said unit including a heat generating assembly substantially closed at the top, a heat insulating plate conforming substantially in shape and size with the top of said heat 'generating assembly and spaced therefrom to provide a narrow air circulating passage extending completely acrossv said tcp, and a handle of low heat conducting material having integral therewith a base' portion conforming substantially in shape and size with'said heat insulating plate and spaced therefrom to provide a narrow air circulating passage extending completely across said plate.

26..'Ihe combination in a sad-iron of an electrically heated sole'plate structure constituting a completely operative unit having a thermostat switch mechanism for controllingY the temperature, a manually operable member located above the sole plate proper adjacent to the front end thereof and operatively connected with the switch mechanism for making temperature adjustments: ahandle unit of molded insulation material shaped to receive and house the projecting tempera-ture adjusting means when located inv operative position on the s ole plate unit and providing access to the manually operable member for making temperature adjustments; and means for detachably securing the handle unit to the sole plate unit in said operative position.

27. The combination in a sad-iron of an-electrically heated sole plate structure constituting a completely operative unit having a thermostat switch mechanism for controlling the temperature, a manually operable member located above the soe plate proper adjacent to the front end thereof and operatively connected with the switch mechanism for making temperature .adjustments; a handle unit having a handle proper and a hollow front support for the handle, the hollow support adapted to receive and house the projecting temperature adjusting means when located in operative position on the sole plate .unit and providing access to the manually opery 28. The combination in a sad-iron of an electrically heated sole plate unit, a handle unit hav ing a handle proper and a base joined by a supporting portion, said handle parts being molded of insulation material, and an attachment insert moldedinto the underside of the base, said insert and the sole plate unit being shaped to provide inter-engaging parts for attachment oi' the one unit to the other.

29. The combination in a. sad-iron of an electrically heated sole plate unit, a. handle unit having a handle proper and a base `ioined by a supporting portion, said handle parts being molded of insulation material, andan attachment insert molded into the underside 4oi? the base, said insert having laterally spaced depending bayonet fingers, the sole plate unit having means for the reception lof said fingers upon relative sliding movement, and means operative between the units to prevent relative displacement ofthe bayonet iingers from their engagement with the sole plate unit.

30. The combination in a sad-iron of an electrically heated sole plate structure constituting a completely operative unit having 'terminal conductors for the heater projecting from the unit and shaped for attachment to a current supply; a handle unit having a handle proper and a hollow rear support for the handle, a current supply cord extending into the hollow support and fixedly clamped thereto, terminal connectors mounted in a fixed location within the hollow support, the terminal ends of theicord having iixed connection with said terminal c` nnectors, said terminal connectors arranged tobe brought into cooperative current conducting relation with the terminal conductors on the sole plate unit when the handle unit is located in operative position thereon; and

means for detachably securing the handle unit to the sole plate unit inA said. operative position.

31. The combination in 'a sad-iron of an electrically heated sole plate structure constituting a completely operative unit having terminal conductors for. the heater projecting from the unit and shaped for attachment to a current supply;

a handle unit having a handle proper and a hollow rear support for the handle of insulation ml.- terial, a current supply cord extending into the hollow support and nxedly clamped thereto, terminal connectors having inserts molded in the hollow support at the interior thereof, the terminal ends of the cord having iixed connection with said inserts, said terminal connectors arranged to be brought into cooperative current conducting relation with the terminal conductors on the sole plate unit when the handle unit is located in operative position thereon; and means for detachably securing the handle unit to the sole plate unit in said operative position.

32. The combination ina sad-iron of an elecg trically heated sole plate structure constituting a completely operative unit having a thermostat switch mechanism for controlling the'temperature, a manually operable member located above y the sole plateproper adjacent to the front end thereof and` operatively connected with the switch mechanism for making temperature adjustments, and having terminal conductors for the heater projecting from the unit and shaped for attachment to a current supply; a handle unit having a handle proper, a hollow front support and a hollow rear support for the handle, the hollow front support adapted `to receive and house the projecting temperature adjusting means when located in operative position on the sole 'plate unit and providing access to the manually operable member for making temperature adjustments, a current-supply cord extending into the hollow rear support and fixedly clamped thereto, terminal connectors mounted. in a fixed Y location within the vrear support, the terminal ends of the cord having fixed connection with said terminal connectors, said terminal connectors arranged to be brought into cooperative cur- 40` rent conducting relation with the terminal conductors on the sole plate unit when the handle v unit'is located in operative position thereon; and

means for detachably securing the handle unit to the sole plate unit in said operative position.

FRANK BISLEY.